Metribuzin (4-amino-6-tert-butyl-3-(methylthio)-as-triazin-5 (4H)-one) is a selective triazinone herbicide applied in both pre- and post-emergence agricultural practices for the control of weeds in a variety of crops including soybeans, potatoes, tomatoes, and sugar cane, which functions by inhibiting the photosynthetic process through the specific disruption of the electron transport chain within photosystem II, and its extensive use has resulted in its classification as a persistent environmental contaminant frequently detected in groundwater sources.